SELECT
    roundtime,
    Inbound_jam,
    Sorter_jam
FROM (
    SELECT
        FROM_UNIXTIME(CEIL(UNIX_TIMESTAMP(a.eventtime) / 600) * 600) AS roundtime,
        SUM(a.category = 'Inbound_jam') AS Inbound_jam,
        SUM(a.category = 'Sorter_jam')  AS Sorter_jam
    FROM (
        SELECT
            ae.eventtime,
            m.category
        FROM alarm_events ae
        JOIN (
            -- Inbound devices
            SELECT 'UL15_1_TPE1'  AS device, 'Inbound_jam' AS category UNION ALL
            SELECT 'UL14_1_TPE1', 'Inbound_jam' UNION ALL
            SELECT 'PS3_1_TPE1',  'Inbound_jam' UNION ALL
            SELECT 'PS3_1_TPE2',  'Inbound_jam' UNION ALL
            SELECT 'PS3_1_TPE3',  'Inbound_jam' UNION ALL
            SELECT 'PS3_2_TPE1',  'Inbound_jam' UNION ALL
            SELECT 'PS3_4_TPE1',  'Inbound_jam' UNION ALL
            SELECT 'PS3_8_TPE1',  'Inbound_jam' UNION ALL
            SELECT 'PS3_10_TPE1', 'Inbound_jam' UNION ALL

            -- Sorter devices
            SELECT 'PS3_12_TPE1', 'Sorter_jam'
        ) AS m
            ON ae.displaypath = m.device
        WHERE ae.eventtype = 0
          AND ae.eventtime BETWEEN :starttime AND :endtime
          AND ae.displaypath NOT LIKE '%System Startup%'
          AND ae.source NOT LIKE '%System Startup%'
    ) AS a
    GROUP BY FROM_UNIXTIME(CEIL(UNIX_TIMESTAMP(a.eventtime) / 600) * 600)
    ORDER BY roundtime ASC
) AS okeyjam;